Blue Light Driven Free-Radical Polymerization using Arylazo Sulfones as Initiators

2021 ◽  
Author(s):  
Andrea Nitti ◽  
Angelo Martinelli ◽  
Fabrice Batteux ◽  
Stefano Protti ◽  
Maurizio Fagnoni ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Blue Light ◽  
Room Temperature ◽  
Free Radical Polymerization

The polymerization of a broad range of electron-poor olefins has been achieved under free-radical conditions by using arylazo sulfones as visible light photoinitiators. The process proceeds smoothly at room temperature...

scholarly journals Hierarchically porous π-conjugated polyHIPE as a heterogeneous photoinitiator for free radical polymerization under visible light

2014 ◽  
Vol 5 (11) ◽  
pp. 3559-3562 ◽  
Author(s):  
Zi Jun Wang ◽  
Katharina Landfester ◽  
Kai A. I. Zhang
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Methyl Methacrylate ◽  
Energy Saving ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Free Radical Polymerization ◽  
Light Bulb ◽  
Household Energy ◽  
Hierarchically Porous

A hierarchically porous π-conjugated polyHIPE was used as a heterogeneous visible light photoinitiator for the radical polymerization of methyl methacrylate (MMA) under a household energy saving light bulb at room temperature.

scholarly journals Panchromatic Copper Complexes for Visible Light Photopolymerization

Photochem ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 167-189
Author(s):  
Alexandre Mau ◽  
Guillaume Noirbent ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Didier Gigmes ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Copper Complexes ◽  
Free Radical Polymerization ◽  
Photoluminescence Properties ◽  
System Formation ◽  
Iodonium Salt ◽  
Visible Light Photopolymerization ◽  
Cationic Polymerizations

In this work, eleven heteroleptic copper complexes were designed and studied as photoinitiators of polymerization in three-component photoinitiating systems in combination with an iodonium salt and an amine. Notably, ten of them exhibited panchromatic behavior and could be used for long wavelengths. Ferrocene-free copper complexes were capable of efficiently initiating both the radical and cationic polymerizations and exhibited similar performances to that of the benchmark G1 system. Formation of acrylate/epoxy IPNs was also successfully performed even upon irradiation at 455 nm or at 530 nm. Interestingly, all copper complexes containing the 1,1′-bis(diphenylphosphino)ferrocene ligand were not photoluminescent, evidencing that ferrocene could efficiently quench the photoluminescence properties of copper complexes. Besides, these ferrocene-based complexes were capable of efficiently initiating free radical polymerization processes. The ferrocene moiety introduced in the different copper complexes affected neither their panchromatic behaviors nor their abilities to initiate free radical polymerizations.

scholarly journals New 1,8-Naphthalimide Derivatives as Photoinitiators for Free-Radical Polymerization Upon Visible Light

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 637 ◽  
Author(s):  
Aude-Héloïse Bonardi ◽  
Soraya Zahouily ◽  
Céline Dietlin ◽  
Bernadette Graff ◽  
Fabrice Morlet-Savary ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Light Exposure ◽  
Free Radical Polymerization ◽  
Thermal Processes ◽  
Light Emitting ◽  
Chemical Mechanisms ◽  
Full Picture ◽  
Methacrylate Monomers

Photopolymerization processes, and especially those carried out under visible light, are more and more widespread for their multiple advantages compared to thermal processes. In the present paper, new 1,8-naphthalimide derivatives are proposed as photoinitiators for free-radical polymerization upon visible light exposure using light-emitting diodes (LEDs) at 395, 405, and 470 nm. These photoinitiators are used in combination with both iodonium salts and phosphine. The synthesis of these compounds as well as their excellent polymerization initiation ability for methacrylate monomers are presented in this article. A full picture of the involved chemical mechanisms is also provided thanks to photolysis, radical characterization, and redox measurements.

Tetraacylgermanes: Highly Efficient Photoinitiators for Visible-Light-Induced Free-Radical Polymerization

2017 ◽  
Vol 56 (11) ◽  
pp. 3103-3107 ◽  
Author(s):  
Judith Radebner ◽  
Anna Eibel ◽  
Mario Leypold ◽  
Christian Gorsche ◽  
Lukas Schuh ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Highly Efficient

Pyrromethene 567 Dye as Visible Light Photoinitiator for Free Radical Polymerization

2003 ◽  
Vol 204 (18) ◽  
pp. 2233-2239 ◽  
Author(s):  
O. García ◽  
A. Costela ◽  
I. García-Moreno ◽  
R. Sastre
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Free Radical Polymerization
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